.box-model {
    /*
    margin-right: 18px;
    padding-top: 8px;
    */
    /*
    margin: 6px 12px;
    */
    margin: 12px 8px 24px 16px;

    /* 边框*/
    border: 2px solid black;

   /*宽度和高度*/
   width: 80px;
   height: 120px;
}